Mahle SS45911 Engine Valve Stem Oil Seal Set - Exhaust

Engine Valve Stem Oil Seal Set for GM V6 Exhaust Valves

The Mahle SS45911 engine valve stem oil seal set is built for exhaust valve sealing in a wide range of GM applications, including Buick, Chevrolet, Oldsmobile, and Pontiac models. It uses a metal body with molded rubber to help maintain a consistent seal at the valve stem and support proper oil control in the cylinder head.

Key Features

• Engine valve stem oil seal set for exhaust valve applications
• Metal with molded rubber construction for sealing durability
• Upper inside diameter-valve side: 7.5 mm
• Inside diameter: 0.295 in
• Outside diameter: 0.472 in
• Height: 0.012 in
• Mahle SS45911 for OE-style sealing service

Detailed Product Overview

Mahle SS45911 is designed for exhaust valve stem sealing where precise dimensions matter. The seal’s 0.295-inch inside diameter, 0.472-inch outside diameter, and 0.012-inch thickness support a controlled fit on the valve stem area, while the metal with molded rubber design helps maintain sealing performance under engine heat. This part cross-references FEL-PRO SS 72144 and SS 72882 for the same application. It also cross-references General Motors 24502712 and 24507691 for the same application.

Compatible With 2005-2009 Buick Allure, exhaust; 2005-2009 Buick LaCrosse, exhaust; 2006-2008 Buick Lucerne, exhaust; 1997-2008 Pontiac Grand Prix, exhaust; 1995-2005 Buick LeSabre, exhaust; 1995-2005 Buick Park Avenue, exhaust; 2000-2005 Chevrolet Impala, exhaust; 1998-2005 Chevrolet Monte Carlo, exhaust; 1995-2005 Pontiac Bonneville, exhaust; 1995-2004 Buick Regal, exhaust; 1995-2002 Chevrolet Camaro, exhaust; 1995-2002 Pontiac Firebird, exhaust; 1995-1999 Buick Riviera, exhaust; 1998-1999 Chevrolet Lumina, exhaust; 1995-1999 Oldsmobile 88, exhaust; 1998-1999 Oldsmobile Intrigue, exhaust; 1996-1999 Oldsmobile LSS, exhaust; 1997-1998 Oldsmobile Regency, exhaust; and 1995-1996 Oldsmobile 98, exhaust.

Common Issues This Part Addresses

• Oil leakage past the valve stem seal
• Excessive oil consumption from worn exhaust valve seals
• Blue exhaust smoke caused by oil entering the combustion chamber
• Carbon buildup related to poor valve stem sealing
• Loss of sealing integrity during cylinder head service

Installation Notes and Tips

Verify valve stem diameter and seal dimensions before installation, especially on GM 3.8L-era cylinder head service where exact fit is critical. Inspect the valve guide and stem for wear, clean the sealing surface thoroughly, and install the seal squarely to avoid damage to the molded rubber sealing lip. For vehicle-specific service, confirm the application against the engine code and cylinder head configuration used in your Buick, Chevrolet, Oldsmobile, or Pontiac model.

Quality Assurance

Mahle gaskets and sealing components are used by OEMs and technicians worldwide, and this SS45911 seal set follows that OE-focused approach to engine sealing. Mahle SS45911 is built for consistent fitment and dependable exhaust valve stem oil control in the listed applications.